package com.example.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.reggie.common.BaseContext;
import com.example.reggie.common.CustomException;
import com.example.reggie.entity.*;
import com.example.reggie.mapper.OrderMapper;
import com.example.reggie.mapper.SetmealMapper;
import com.example.reggie.service.*;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.beans.beancontext.BeanContext;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    //用户下单
    @Override
    @Transactional
    public void submit(Orders orders) {
        //获得当前用户id
        Long orderId = BaseContext.getCurrentId();

        //查询当前用户购物车数据
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId, orderId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(wrapper);
        if (shoppingCartList == null && shoppingCartList.size() == 0) {
            throw new CustomException("购物车为空");
        }

        User user = userService.getById(orderId);

        //查询地址数据
        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());
        if (addressBook == null) {
            throw new CustomException("地址信息有误");
        }

        //原子操作，避免多线程多并发实现的误操作，保证线程安全
        AtomicInteger amount = new AtomicInteger(0);
        //遍历购物车数据,获得订单明细
        List<OrderDetail> orderDetails = shoppingCartList.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            //addAndGet 加法 +=
            //multiply 乘法：        单份金额        *                份数
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());//总金额
            return orderDetail;
        }).collect(Collectors.toList());

        //向订单表插入数据,一条数据
        long id = IdWorker.getId();//订单号
        orders.setId(id);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(orderId);
        orders.setNumber(String.valueOf(id));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));

        this.save(orders);

        //向订单明细表插入数据,多条数据
        orderDetailService.saveBatch(orderDetails);
        //清空购物车
        shoppingCartService.remove(wrapper);

    }

}
